My phone was working fine when i got it and i have a data plan and i know it works because i've used it before. Lately it wont work when i try to turn it on and im wondering why. I have AT&T and to turn it on and off i would enter *#*#4636#*#* then go to phone information and go to the menu and turn it on. I dont want to have to reset my phone because i dont want to lose my apps. How can i get my 3G working?